Mobile step-ladder



FIG. 1 is a perspective view of the mobile step-ladder of the present invention;

FIG. 2 is an elevational rear view of the mobile step-ladder shown in FIG. 1;

FIG. 3 is an elevational front view of the mobile step-ladder shown in FIG. 1;

FIG. 4 is an elevational top view of the mobile step-ladder shown in FIG. 1;

FIG. 5 is an elevational bottom view of the mobile step-ladder shown in FIG. 1;

FIG. 6 is a left side view of the mobile step-ladder shown in FIG. 1; and,

FIG. 7 is a right side view of the mobile step-ladder shown in FIG. 1. 

The ornamental design for a mobile step-ladder, as shown and described. 